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52 lines
1.8 KiB
52 lines
1.8 KiB
9 months ago
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Backport the support/ changes from this commit, to avoid future
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conflicts:
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commit 446997ff1433d33452b81dfa9e626b8dccf101a4
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Wed Oct 30 17:26:58 2019 +0100
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resolv: Implement trust-ad option for /etc/resolv.conf [BZ #20358]
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This introduces a concept of trusted name servers, for which the
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AD bit is passed through to applications. For untrusted name
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servers (the default), the AD bit in responses are cleared, to
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provide a safe default.
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This approach is very similar to the one suggested by Pavel Šimerda
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in <https://bugzilla.redhat.com/show_bug.cgi?id=1164339#c15>.
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The DNS test framework in support/ is enhanced with support for
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setting the AD bit in responses.
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Tested on x86_64-linux-gnu.
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Change-Id: Ibfe0f7c73ea221c35979842c5c3b6ed486495ccc
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diff --git a/support/resolv_test.c b/support/resolv_test.c
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index 3f2a09f36f445878..28af227cb5ed901c 100644
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--- a/support/resolv_test.c
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+++ b/support/resolv_test.c
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@@ -182,6 +182,8 @@ resolv_response_init (struct resolv_response_builder *b,
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if (flags.tc)
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b->buffer[2] |= 0x02;
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b->buffer[3] = 0x80 | flags.rcode; /* Always set RA. */
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+ if (flags.ad)
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+ b->buffer[3] |= 0x20;
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/* Fill in the initial section count values. */
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b->buffer[4] = flags.qdcount >> 8;
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diff --git a/support/resolv_test.h b/support/resolv_test.h
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index 4c2e6c1b417f5fcd..be736aead40cd0cc 100644
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--- a/support/resolv_test.h
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+++ b/support/resolv_test.h
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@@ -134,6 +134,9 @@ struct resolv_response_flags
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/* If true, the TC (truncation) flag will be set. */
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bool tc;
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+ /* If true, the AD (authenticated data) flag will be set. */
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+ bool ad;
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+
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/* Initial section count values. Can be used to artificially
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increase the counts, for malformed packet testing.*/
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unsigned short qdcount;
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